Muscle
Opponens digiti minimi
Hypothenar — cups the palm
High-yield
Rotates the 5th metacarpal to cup the palm; ulnar nerve.
Overview
A hypothenar muscle that rotates the 5th metacarpal to deepen the palm during opposition. Deep ulnar branch.
Reference facts
- Origin
Hook of the hamate and flexor retinaculum
- Insertion
Medial border of the 5th metacarpal
- Action
Draws the 5th metacarpal forward and rotates it, deepening the palm
- Innervation
Deep branch of the ulnar nerve (C8, T1)
- Blood supply
Deep palmar arch